Caves biome

Hello, I'm new here, although I've been using Mcreator for a long time, so I wanted to write my suggestion about Caves here.

In general, we could create caves, change their width and height, the main block and the floor block, as well as add rivers of water/lava/your liquid. You can also implement structures that ONLY appear in caves. Well, I think that's all for now. Bye! :)

And i'm sorry if i dublicated some suggestion